题目内容
4、I ________ my homework ________ the telephone rang at 8 last night．
A．was doing；when B．did；when
C．was doing；while D．did；while
试题答案
4、A
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题目内容
4、I ________ my homework ________ the telephone rang at 8 last night．
A．was doing；when B．did；when
C．was doing；while D．did；while
试题答案
4、A